Merge PDF Files on Mac

If you use a Mac, you have two good ways to combine PDF files, and neither costs anything. The quickest for most people is this page: open it in Safari, Chrome, Firefox or Edge, drag your PDFs from Finder onto the drop area, arrange them with the up and down arrows and click Merge PDF. The combined document lands in your Downloads folder a moment later. Because pdfdots runs completely inside the browser, your files are never uploaded — which matters when you are combining tax returns, medical records or client contracts on a work machine.

The second option is Preview, the PDF viewer built into macOS. Open the first PDF in Preview, choose View > Thumbnails to show the sidebar, then drag the other PDF files from Finder into that sidebar at the position where you want them. Save with File > Export as PDF to keep the original untouched. Preview is handy when you only need to insert a few pages, but dragging many files one at a time gets fiddly, and it's easy to drop a document in the wrong spot or accidentally overwrite the original.

The browser method shines when you have lots of files or want a clear list view with a predictable order. It behaves identically on Intel and Apple silicon Macs and on every recent macOS version, and it works just the same on a borrowed or managed Mac where you can't install apps. After merging, you can keep going in the same tab: compress the result for email, add page numbers, or remove a stray blank page — all without anything leaving your Mac.